package com.example.community.controller;

import com.example.community.dao.pojo.User;
import com.example.community.service.LoginTicketService;
import com.example.community.service.RegisterService;
import com.example.community.uitls.CommunityUtil;
import com.example.community.uitls.RedisKeyUtil;
import com.google.code.kaptcha.Producer;
import io.netty.util.internal.StringUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.example.community.uitls.CommunityConstant.*;

/**
 * @ClassName: LoginController
 * @Description:
 * @Author
 * @Date 2022-03-17
 * @Version 1.0
 */
@Slf4j
@Controller
public class LoginController {

    @Autowired
    RegisterService registerService;

    @Autowired
    Producer kaptchaProducer;

    @Autowired
    LoginTicketService loginTicketService;

    @Autowired
    private RedisTemplate redisTemplate;


    @GetMapping("/register")
    public String getRegisterPage() {
        return "/site/register";
    }

    @GetMapping( "/login")
    public String getLoginPage() {
        return "/site/login";
    }

    @PostMapping( "/register")
    public String register(Model model, User user){
        Map<String, Object> map = registerService.register(user);
        if (map==null ||map.isEmpty()){
            model.addAttribute("msg","注册成功,我们已经向您的邮箱发送了一封激活邮件,请尽快激活!");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else {
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "/site/register";
        }
    }

    @GetMapping("/activation/{userId}/{code}")
    public String activation(Model model, @PathVariable("userId") int userId,@PathVariable("code") String code){
        int result = registerService.activation(userId,code);
        if (result == ACTIVATION_SUCCESS) {
            model.addAttribute("msg", "激活成功,您的账号已经可以正常使用了!");
            model.addAttribute("target", "/login");
        } else if (result == ACTIVATION_REPEAT) {
            model.addAttribute("msg", "无效操作,该账号已经激活过了!");
            model.addAttribute("target", "/index");
        } else {
            model.addAttribute("msg", "激活失败,您提供的激活码不正确!");
            model.addAttribute("target", "/index");
        }
        return "/site/operate-result";
    }
//     使用session存储验证码
//    @GetMapping("/kaptcha")
//    public void getKaptcha(HttpServletResponse response, HttpSession session){
//        //生成验证码
//        String text = kaptchaProducer.createText();
//        BufferedImage image = kaptchaProducer.createImage(text);
//
//        //将验证码存入session中
//        session.setAttribute("kaptcha",text);
//        //将图片输出给浏览器
//        response.setContentType("imag/png");
//        try {
//            OutputStream os = response.getOutputStream();
//            ImageIO.write(image, "png", os);
//        } catch (IOException e) {
//            log.info("响应验证码失败:" + e.getMessage());
//        }
//
//    }

    //代码重构，使用redis进行存储
    @GetMapping("/kaptcha")
    public void getKaptcha(HttpServletResponse response){
        //生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);

        String KaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("KaptchaOwner", KaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath("/");
        response.addCookie(cookie);

        //将验证码存入Redis中
        //redisKey =  kaptcha:KaptchaOwner
        String redisKey = RedisKeyUtil.getKaptchaKey(KaptchaOwner);
        redisTemplate.opsForValue().set(redisKey,text,60, TimeUnit.SECONDS);

        //将图片输出给浏览器
        response.setContentType("imag/png");
        try {
            OutputStream os = response.getOutputStream();
            ImageIO.write(image, "png", os);
        } catch (IOException e) {
            log.info("响应验证码失败:" + e.getMessage());
        }

    }


    /**
     * 登录功能
     */

    @PostMapping("/login")
    public String login(String username, String password, String code, boolean rememberme,
                Model model,HttpServletResponse response,@CookieValue("KaptchaOwner") String KaptchaOwner){
        //检查验证码
//        String kaptcha = (String) session.getAttribute("kaptcha");
        String kaptcha = null;
        if (StringUtils.isNotBlank(KaptchaOwner)){
            String redisKey = RedisKeyUtil.getKaptchaKey(KaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(redisKey);
        }

        if (StringUtils.isBlank(kaptcha)||StringUtils.isBlank(code)||!kaptcha.equalsIgnoreCase(code)){
            model.addAttribute("codeMsg","验证码不正确");
            return "/site/login";
        }
        //检查账号密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = loginTicketService.login(username, password, expiredSeconds);
        if (map.containsKey("ticket")){
            Cookie cookie = new Cookie("ticket",map.get("ticket").toString());
            cookie.setPath("");
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        }else {
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            return "/site/login";
        }

    }

    @GetMapping("/logout")
    public String logout(@CookieValue("ticket") String ticket){
        loginTicketService.logout(ticket);
        SecurityContextHolder.clearContext();
        return "redirect:/login";
    }
}
